DLEP IEEE 802.1Q Aware Credit Window Extension
draft-berger-manet-dlep-ether-credit-extension-00

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Network Working Group                                         D. Wiggins
Internet-Draft                                        Lincoln Laboratory
Intended status: Standards Track                               L. Berger
Expires: November 2, 2018                        LabN Consulting, L.L.C.
                                                             May 1, 2018

             DLEP IEEE 802.1Q Aware Credit Window Extension
           draft-berger-manet-dlep-ether-credit-extension-00

Abstract

   This document defines an extension to the DLEP protocol that enables
   a Ethernet IEEE 802.1Q aware credit-window scheme for destination-
   specific and shared flow control.

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Wiggins & Berger        Expires November 2, 2018                [Page 1]
Internet-Draft       DLEP Ethernet Credit Extension             May 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Key Words . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Extension Usage and Identification  . . . . . . . . . . . . .   3
   3.  Management Considerations . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Extension Type Value  . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The Dynamic Link Exchange Protocol (DLEP) is defined in [RFC8175].
   It provides the exchange of link related control information between
   DLEP peers.  DLEP peers are comprised of a modem and a router.  DLEP
   defines a base set of mechanisms as well as support for possible
   extensions.  This document defines one such extension.

   The base DLEP specification does not include any flow control
   capability.  There are various flow control techniques theoretically
   possible with DLEP.  For example, a DiffServ aware credit window
   extension is defined in [I-D.ietf-manet-dlep-da-credit-extension].

   This document defines a DLEP extension which provides a flow control
   mechanism for traffic sent from a router to a modem.  Flow control is
   provided using one or more logical "Credit Windows", each of which
   will typically be supported by an associated virtual or physical
   queue.  Traffic sent by a router will use traffic flow classification
   information provided by the modem to identify which traffic is
   associated with each credit window.  (For general background on
   traffic classification see [RFC2475] Section 2.3.)  Credit windows
   may be shared or dedicated on a per flow basis.  The extension is
   structured to allow for reuse of the defined credit window based flow
   control with different traffic classification techniques.

   This document uses the traffic classification and credit window
   control mechanisms defined in [I-D.ietf-manet-credit-flow-control] to
   provided credit window based flow control based on on DLEP
   destination and Ethernet VLANs and Priority Code Points.  Ethernet
   Priority Code Point support is defined as part of the IEEE 802.1Q
   [IEEE.802.1Q_2014] tag format and includes a 3 bit "PCP" field.  The
   tag format also includes a 12 bit VLAN identifier (VID) field.  The
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